diff --git a/src/models/notification.ts b/src/models/notification.ts
index 394e49f36..5cf1e140c 100644
--- a/src/models/notification.ts
+++ b/src/models/notification.ts
@@ -48,7 +48,7 @@ export interface INotification {
 	/**
 	 * 通知が読まれたかどうか
 	 */
-	isRead: Boolean;
+	isRead: boolean;
 }
 
 export const packMany = (